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GR: Fachverband Gravitation und Relativitätstheorie

GR 3: Schwarze Löcher 2

GR 3.4: Vortrag

Montag, 15. März 2010, 17:45–18:05, JUR K

Charged Boson Stars and Black Holes — •Meike List¹, Jutta Kunz², Burkhard Kleihaus², and Claus Lämmerzahl¹ — ¹ZARM - Universität Bremen, Am Fallturm, 28359 Bremen — ²Carl-von-Ossietzky-Universität Oldenburg, Carl-von-Ossietzky-Straße 9-11, 26129 Oldenburg

We consider boson stars and black holes in scalar electrodynamics with a V-shaped scalar potential. The boson stars come in two types, having either ball-like or shell-like charge density. We analyze the properties of these solutions and determine their domains of existence. When mass and charge become equal, the space-times develop a throat. The shell-like solutions need not be globally regular, but may possess a horizon. The space-times then consist of a Schwarzschild-type black hole in the interior, surrounded by a shell of charged matter, and thus a Reissner-Nordstrøm-type space-time in the exterior. These solutions violate black hole uniqueness. The mass of the black hole solutions is related to the mass of the regular shell-like solutions by a mass formula of the type first obtained within the isolated horizon framework.